Validation of standard ASTM F2732 and comparison with ISO 11079 with respect to comfort temperature ratings for cold protective clothing
Författare
Summary, in English
American standard ASTM F2732 estimates the lowest environmental temperature for thermal comfort for cold weather protective clothing. International standard ISO 11079 serves the same purpose but expresses cold stress in terms of required clothing insulation for a given cold climate. The objective of this study was to validate and compare the temperature ratings using human subject tests at two levels of metabolic rates (2 and 4 MET corresponding to 116.4 and 232.8 W/m(2)). Nine young and healthy male subjects participated in the cold exposure at 3.4 and -30.6 °C. The results showed that both standards predict similar temperature ratings for an intrinsic clothing insulation of 1.89 clo and for 2 MET activity. The predicted temperature rating for 2 MET activity is consistent with test subjects' thermophysiological responses, perceived thermal sensation and thermal comfort. For 4 MET activity, however, the whole body responses were on the cold side, particularly the responses of the extremities. ASTM F2732 is also limited due to its omission and simplification of three climatic variables (air velocity, radiant temperature and relative humidity) and exposure time in the cold which are of practical importance.
Avdelning/ar
Publiceringsår
2015
Språk
Engelska
Sidor
44-53
Publikation/Tidskrift/Serie
Applied Ergonomics
Volym
46
Issue
Online 17 July 2014
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Production Engineering, Human Work Science and Ergonomics
Nyckelord
- Cold
- protective clothing
- Metabolic rate
- Thermal comfort
Status
Published
Forskningsgrupp
- Thermal Environment Laboratory
ISBN/ISSN/Övrigt
- ISSN: 1872-9126